Pump



Feb. 10, 1942. c. E. FRASER ETAL PUMP 2 Sheets-Sheet 1 Filed Jan. 11, 1939 Inventors Feb. 10, 1942. c. E. FRASER EI'AL 2,272,518

PUMP

Filed Jan. 11, 1939 2 Sheets-Sheet 2 Inventors Patented Feb. 10, 1942 PURE - Clarence E. Fraser and Edward O. Hulsmann,

Chicago, 111.

Application January 11, 1939, Serial No. 258,279 1 Claim. (Cl. 230-186) This invention relates to pumps and particularly to pumps for vacuum and v compression purposes; I

One object of the present inventionis to provide a high speed pump operating at high efficiency.

Another object of the invention is to provide a novel means whereby a rotary oscillating motion is created to operate the pistons.

A further object of the invention is to provide means to compensate for lost motion due to friction.

One embodiment of the present invention is shown for illustrative purposes in the accompanying drawings, in which:

Fig. 1 is a sectional elevational view of the pump and illustrating the application of the present invention thereto;

Fig. 2 is a front elevational view of a cylinder heai plate as illustrated in Fig. 1 by the lines Fig. 3 is a longitudinal elevational view of the driving mechanism illustrated in Fig. 1 as illustrated by the lines 3-3; p 4

Fig. 4 is a sectional elevation view of a portion of a cylinder head plate, cylinder, piston and push rod and illustrating a detail of the valves and stufiing box guides and a ball cap to receive shims. v

In the drawings, the pump is illustrated as a whole (Fig. 1) having cylinders, two in the present instance indicated by the numerals 5-6 with cooling fins I, mounted circumferentially between two cylinder head plates 8-9.

Pistons, two in the present instance, are positioned in the cylinders 5-6 between head plates 8-9 and indicated by the numerals IO-l l. The pistons are provided with push rods substantially continuous and in a manner whereby a push rod I2 is mounted on one end of piston Hi to extend through head plate 8. A stufling box 2'! of the ordinary type is mounted on head plate 8 to provide a guide for push rod I2 (Fig. 1). In like manner a push rod I3 is positioned on the opposite end of piston In in a manner to extend through head plate 9 and stufling box guide 24 on head plate 9.

Piston H .in cylinder 6 is equipped with push rods l4-l5 identical to 'rods l2-l3, and related respectively to stufling box guide 25-26 mounted respectively, on head plates 9-8 (Fig. 1) and illustrated in detail in Fig. 4.

A drive shaft 23 (Figs. 1 and 3) is positioned through the cylinder head plates 8-9 in bearings 41-48 respectively. Circular parallel discs. 65

two in the present instance and indicated as 20-21 are mounted outside of the head plates 8-9 on the drive shaft 23 at an angle, in the present instance of thirty degrees.

Mounted on the outer end portions of push rods l2-l3-I4-l5 are ball shaped caps l6-l1-l8-l9 (Fig. 1) to provide contact with the circular angle discs 20-2l and in Fig. 4 illustrates a method to provide for shims 52 contained in the recess 58 of ball cap I8 and bear against the fiat surface 5| of push rod l4 mounted on piston III in cylinder 5.

The stuffing box guide 25 (Fig. 4) contains packing related to a follower plate 56 and N positioned by a lock nut 51.

Valves of the ordinary type and indicated as a whole by the numerals 35-38-31-38 are positioned in head plate 8 (Fig. 1) whereby 36-31 areoutlet valves and 35-38 are inlet valves. Similarly, the valves 39-40-4l-42 are positioned in head plate 9 where 40-4l are outlet valves and 39-42 are inlet valves. Manifolds 28-29 are positioned respectively on the head plates 8-9 and related to the outlet valves. Manifolds 3l-34 are related respectively to the inlet valves 38 and 35 on head plate 8 and manifolds 32 and 33 are related respectively to 42 and 39 on head plate 9.

A housing 43 to contain oil or the like is mounted on head plate 8 with a screw type plug 49 and a. housing 44 is mounted on head plate 9 to contain oil or the like and provided with a screw typeplug 50. The inlet manifolds 3l-34 pass through the oil housing 43 (Fig. 1) and the inlet manifolds 32 and 33 pass through the oil housing 44.

The outlet manifolds 28 and 29 (Fig. 2) are provided with a duct 30 on manifold 28 and indicated by the dotted circles (Fig. 1) as the numeral 30 and 38a respectively on manifolds 28 and 29 whereby the outlet valves are related to their respective manifolds outside of the oil housings 43 and 44. I

The operation of the pump is substantially'as follows:

As suitable rotary power is applied to the drive shaft 23 (Figs. 1 and 3) the circular parallel discs 20 and 2| will rotate, due to their being mounted angularly, in a manner whereby an oscillating motion is created and indicated by the dotted line 4-4. This motion will cause the discs 20-2I to bear against the ball caps Iii-I9 and l'l-l8 respectively and cause the push rods [2-15 and l3-l4 to reciprocate or move foreward and rearward. As the pushrods are mounted in stufiing box guides, 24-2l-2l2| the pistons lfl-ll will float in the respective cylinders 5 and 8. The rotary oscillating motion of the angle discs 20 and II will create a splash lubrication.

Housing 43 can be provided with a stufling box for drive shaft 23 and indicated as a whole by the numeral 4!. Housing 44 can be provided with a bearing ll in the present instance as a portion of the housing casting 44 to support the end portion 69 of drive shaft 23 (Fig. 1).

This invention is not confined to a pump as illustrated in the drawings and described in detall but can be applied in various combinations as pointed out in the appended claim.

Having described our invention, what we claim as new and desire to secure by Letters Patent is:

In a pump of the kind described, the combination of a housing, a driving shaft Journaled in said housing, said housing having a pair of end chambers adjacent opposite ends of said shaft,

said housing having a plurality of bores intermediate said chambers /but separated therefrom and extending parallel to said shaft, pistons slidably carried in said bores, compression rods extending from opposite ends of said pistons into the respective chambers. a pair of discs rigidly carried by said driving shaft in said chambers and engageable with the ends of said rods, said discs being disposed in parallel planes non-pen 

